Transcription of MECHANICAL TESTS - Rodacciai
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MECHANICAL TESTS - Rodacciai
TESTM agnitudeSymbolMeasurement unitDescriptionTensile strengthRmMPa (N/mm2)it is the ratio between the maximum applied force and the original cross-sectional area of the specimenUpper yield strengthRsMPa (N/mm2)it is detectable only when the material has the yield phenomenon (it doesn t exist for the cold drawn and the stainless steels)Yield pointRpMPa (N/mm2)it is detectable on cold drawn and stainless steel, in place of R5Rp(0,2)MPa (N/mm2)load corresponding to a no proportional charge equal to a 0,2% of length L0Rp(1,0)MPa (N/mm2)load corresponding to a no proportional charge equal to a 1% of length L0 ElongationA%permanent elongation of length L0, expressed in per cent of length L0A5%permanent elongation for proportional specimens with length L0 equal to 5 times diameterA4%permanent elongation for proportional specimens with length L0 equal to 4 times diameterA0%permanent elongation for proportional specimens with length L0 equal to 100 mm (used for diameter lower than 4mm)Reduction areaZ%Ratio between the maximum variation of area of tra
wwwodacciaico TENSION TEST Magnitude Symbol Measurement unit Description Tensile strength R m MPa (N/mm2) it is the ratio between the maximum applied force and the original cross-sectional area of the specimen Upper yield strength R s MPa (N/mm2) it is detectable only when the material has the yield phenomenon (it doesn’t exist for the cold drawn and
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